Heating & Cooling Head: Renpho Massage Gun comes with a heating and cooling massage head that can heat up to 113°F (45°C) or cool down to 47 ℉（8°C） for deeper muscle relaxation. When you use the hot or cold massage head, please plug it in tightly. 15W PD Fast Charging & Type C Charging: Supports 15W PD Fast Charging, fully charging just needs 1.5-2 hours while the normal model needs at least 4 hours. Powered by 5X longer cycle rechargeable battery, the RENPHO upgrade massage gun can be charged by A-C or C-C Cable. Fast charging anytime, anywhere for portable use. HIGH SPEED 3200RPM/M BRUSHLESS MOTOR: ACTIVE Massage Gun is equipped with powerful brushless motor, which can reach 1800 to 3200rpm/min, available for different muscle groups, aiding in muscle relax and shape different body muscle parts. 0.68KG SUPER LIGHT&ERGONOMIC DESIGN: Renpho Massage Gun weighs only 0.68kg，it's much lighter than other massage guns in same size, makes it so easy to carry during the whole massage. Ergonomic design, all operations can be completed with only one button by yourself. You can even enjoy the deep muscle massage independently with one hand. SUPER QUIET LESS THAN 45dB: The brushless noise reduction motor is equipped with a new generation of noise reduction technology to control the noise within 45dB, just like whispering in the ear, you enjoy a quiet moment of relaxation! Note: Before using the heat and cold massage gun, please ensure that the massage head is securely connected to the massage gun, as our heat and cold massage heads are powered by the massage gun itself.